Consolidated Statements of Financial Condition (USD $)	Jun. 30, 2012	Dec. 31, 2011
Equity in commodity Trading accounts:
Cash on deposit with broker	$ 3,644,712	$ 2,670,744
Unrealized gain (loss) on open contracts	(347,998)	363,947
Purchased options on futures contracts (premiums paid - $33,376)		22,525
Total due from broker	3,296,714	3,057,216
Cash and cash equivalents on deposit with affiliate	5,180,075	9,596,823
Cash on deposit with bank	6,697	648
Fixed income securities (cost $19,978,783 and $21,993,704, respectively), held by affiliate	19,952,245	21,870,890
Interest receivable	23,152	123,363
Cash on deposit with bank - Non-Trading	796,103	1,647,219
Prepaid expenses - Non-Trading	83,381	95,825
Total Assets	29,338,367	36,391,984
Equity in commodity Trading accounts:
Options written on futures contracts (premiums received - $34,125 and $14,375, respectively)	34,540	1,006
Accrued commissions	68,875	111,034
Accrued management fees	29,191	48,884
Accrued incentive fees	4,411
Accrued operating expenses	179,332	217,118
Accrued offering expenses	11,974
Redemptions payable-Trading	1,040,617	493,332
Accrued legal fees- Non-Trading	2,863	500
Accrued management fees to U.S. Bank-Non-Trading	16,907	31,715
Distribution payable - Non-Trading		536,188
Total liabilities	1,388,710	1,439,777
Unitholders' capital:
Unitholders' capital	27,949,657	34,952,207
Total Liabilities and Unitholders' Capital	29,338,367	36,391,984
Trading
Unitholders' capital:
Unitholders' capital	27,089,923	33,777,543
Trading \| Class A
Net asset value per unit:
Net asset value per unit	$ 83.93	$ 91.32
Trading \| Class B
Net asset value per unit:
Net asset value per unit	$ 90.03	$ 96.98
Trading \| Beneficial owners \| Class A
Unitholders' capital:
Unitholders' capital	26,107,641	32,497,392
Trading \| Beneficial owners \| Class B
Unitholders' capital:
Unitholders' capital	937,379	1,231,294
Trading \| Managing owner \| Class A
Unitholders' capital:
Unitholders' capital	44,903	48,857
LLC equity/Non-Trading
Unitholders' capital:
Unitholders' capital	859,734	1,174,664
Net asset value per unit:
Net asset value per unit	$ 0.38	$ 0.52
LLC equity/Non-Trading \| Participating owners
Unitholders' capital:
Unitholders' capital	102,004	158,535
LLC equity/Non-Trading \| Nonparticipating owners
Unitholders' capital:
Unitholders' capital	$ 757,730	$ 1,016,129

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Carrying amount as of the balance sheet date of expenditures made in advance of when the economic benefit of the cost will be realized, and which will be expensed in future periods with the passage of time or when a triggering event occurs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.10)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 10

-Article 9

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.10)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

Name:	us-gaap_PrepaidExpenseCurrentAndNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. This element is for unclassified presentations; for classified presentations there is a separate and distinct element.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Audit and Accounting Guide (AAG)

-Number AAG-BRD

-Paragraph 80

-Subparagraph Exhibit 4-8, 3

-IssueDate 2006-05-01

-Chapter 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.1)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 1

-Article 5

+ Details

Name:	us-gaap_RestrictedCashAndCashEquivalents
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant